Put your device in a room and click the green flag. When Your done, press stop to get a complete graph of the loudness in the room. Me and my good friend, Scratchcat3456 worked together to make the Sound-O-Meter. We originally made it to record how loud it gets in our classroom (the answer is off the charts.) This is another version that can keep track of the noise in the room, but also save it and recreate the graph again.
I'd like to give a big thanks to Scratchcat3456 for helping me with all of my projects!